Span table columns?

I have a couple of tables in appendices in my NT app. Is there any way to get a cell to span multiple columns? The SFM format mentioned at the bottom of this page: Tables — Unified Standard Format Markers 3.0.0 documentation, i.e. \tc1-4.

I suppose I can end the table, put in some plain or centered text, then start a new table, but I assume the columns wouldn’t necessarily line up between the table above and the table below.